Patients with atrophic gastritis should not eat rock sugar. The main symptoms of atrophic gastritis include upper abdominal distension and pain, belching, acid reflux, nausea, vomiting, poor appetite, and indigestion. A gastroscopy can reveal the atrophy of gastric mucosal glands, which can diagnose atrophic gastritis. The treatment primarily involves fighting Helicobacter pylori, suppressing acid and protecting the stomach, enhancing gastric motility, and repairing the gastric mucosa. Dietary considerations are crucial; one must quit smoking and drinking, avoid strong tea and coffee, and refrain from consuming spicy, fried, raw, cold, sweet foods, and barbecued items. Rock sugar, being a sweet food, must be strictly avoided as sweet foods can increase gastric acid secretion, leading to stomach mucosa irritation and worsening of the condition. Therefore, patients with atrophic gastritis should not consume rock sugar.